find x and measure ABC
pls help I’ve been trying this for 30 minutes.
Geometry

The regression result of 0.320, the beta of 0.136, and the p-value of 0.000.

The strongest predictor in the MLRA summary Table is past history of depression. This is shown by the regression result of 0.320, the beta of 0.136, and the p-value of 0.000. This means that past history of depression has a strong and statistically significant influence on predicting depression at wave 2.

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Answer:

Step-by-step explanation:

1.  Equation representing when both companies will cost the same amount :

\(350 + 15x = 275 + 20x\)

2. Let x equal the number of hours a job takes , then the first house painting company will charge 350+15x , the second house painting will charge 275 +20x. If the two companies charge the same amount , we will have;  

\(350 +15x = 275+20x\\\\350 - 275 = 20x - 15x\\\\75 = 5x\\\\\frac{75}{5} = \frac{5x}{5} \\\\15 = x\\\\x = 15\:hours\)

3. For a job that takes 15 hours , the first company will cost ;

\(350 + 15(15) = 575\)

For a job that takes 15 hours , the second company will cost ;

\(275+20x\\\\275+20(15)\\\\275 +300\\\\=575\)

Answer:

5

Step-by-step explanation:

10/2=5

20/4=5

hope this helps :3

if it did pls mark brainliest

Answer:

1:5

Step-by-step explanation:

30 divided by 6 is 5 and so are the rest

The cost of one computer is £600 and the cost of one printer is £800.

Computing equipment is bought from a supplier. The cost of 5 Computers and 4 Printers is £6,600, and the cost of 4 Computers and 5 Printers is £6,000. Form two simultaneous equations and solve them to find the costs of a Computer and a Printer.

Let the cost of a computer be x and the cost of a printer be y.

Then, the two simultaneous equations are:5x + 4y = 6600 ---------------------- (1)

4x + 5y = 6000 ---------------------- (2)

Solving equations (1) and (2) simultaneously:x = 600y = 800

Therefore, the cost of a computer is £600 and the cost of a printer is £800..

:Therefore, the cost of one computer is £600 and the cost of one printer is £800.

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Answer:

the value of x is 8.

Step-by-step explanation:

\(x {}^{2} = 64\)

\(or \: x = \sqrt{64} \)

therefore x=8

is the answer...

Answer:

x=8

Step-by-step explanation:

\(8^{2} =64\)

8·8·8·8·8·8·8·8=64

hope this helps

good luck!!

Answer:

Step-by-step explanation:

f(x) = -2(x+3)^2 -1 would be the fourth graph because its translated 3 to the left, negative, and 1 down

f(x)=2(x+3)^2+1 would be the first graph since it's translated 3 to the left, positive, and shifted 1 up

f(x)=-2(x+3)^2+1 would be the second graph since it's translated 3 to the right, negative, and shifted 1 up

f(x)=2(x-3)^2+1 would be the third graph since it's translated 3 to the right, positive, and shifted 1 up

Company C would need to employ an additional 70 employees to achieve an annual profit that is 250% more than the current one.

To achieve an annual profit that is 250% more than the current one, Company C needs to increase its profit by 250% of its current profit, which is $200,000.

This gives us a target profit of $700,000. Since the profit per employee remains the same, we can find the number of additional employees needed by dividing the target profit by the profit per employee and subtracting the current number of employees.

Number of additional employees = (Target profit / profit per employee) - Current number of employees

For Company C, the profit per employee is $10,000 ($200,000 / 20), so the number of additional employees needed is:

(Number of additional employees) = ($700,000 / $10,000) - 20 = 70

Therefore, Company C would need to employ an additional 70 employees to achieve an annual profit that is 250% more than the current one.

Note: The cost to purchase the company and the number of employees currently employed are not relevant to this calculation.

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The mass of the gold bar of the trapezium shape and a density of 19.3g/cm³ is found to be 8.646 KG.

The volume of the trapezoidal prism will be determined first. V = BL, where B is the area of the trapezoidal face and L is the prism's length, is the formula for the volume of the prism.

We are aware that a trapezoid's area is equal to B = 1/2(6+10). (4)

B = 32 m²

When we enter the formula for volume, V = 32 x 14 V = 448 m³, we know that L is 14 cm.

Divide the mass by the volume to get the density, or D = M/V.

According to values,

19.3 = M/448

M = 8646.4 grams, which is equal to 8.646 grams.

The density is stated to be 19.3 kg/m³. Hence, the gold weighs 8.646 kilos.

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Complete question - The gold bar trapezium has cross-sectional area. Gold has a density of 19. 3 per cm3. Work out the mass of the gold bar. Give your answer in kilograms. The dimension of the trapezium are length = 14cm, parallel sides are 6cm and 10cm nd the height is 4cm.

The equation of a line that passes through the point (5,-1) and is parallel to the line y=2x-4 will be y=2x-11.

A straight line is a combination of endless points joined on both sides of the point.

The slope 'm' of any straight line is given by:

A linear equation has the form y = mx + b in the slope-intercept format. X and Y are the variables in the equation. The values m and b represent the line's slope (m) and the value of y when x is 0.

\(\rm m =\dfrac{y_2-y_1}{x_2-x_1}\)

It is given that,  

y=2x-4

We have to write an equation of a line that passes through the point (5,-1) and is parallel to the line y=2x-4.

The slope of the given equation,

y=2x-4

m=2

The slope of the parallel lines is equal,

m=2

The equation of a line that passes through the point (5,-1) with slope 2 is,

y-y₁=m(x-x₁)

y-(-1)=2(x-5)

y+1=2(x-5)

y+1=2x-10

y=2x-11

Thus, the equation of a line that passes through the point (5,-1) and is parallel to the line y=2x-4 will be y=2x-11.

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The square of a real number is always non-negative, there are no values of t that satisfy the inequality. Therefore, the soccer ball is never above 15 feet.

The correct answer is none of the given options (A, B, C, or D).

To determine when the soccer ball is above 15 feet, we need to find the values of t that satisfy the inequality h(t) > 15.

Given the quadratic function h(t) = -16t² + 20t + 11, we can set up the inequality:

-16t² + 20t + 11 > 15

Rearranging the inequality:

-16t² + 20t - 4 > 0

Dividing both sides by -4 to simplify:

4t² - 5t + 1 < 0

To solve this quadratic inequality, we can factorize it:

(2t - 1)(2t - 1) < 0

(2t - 1)² < 0

Since the square of a real number is always non-negative, there are no values of t that satisfy the inequality. Therefore, the soccer ball is never above 15 feet.

The correct answer is none of the given options (A, B, C, or D).

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Answer: the ticket cost will be 13.02

Step-by-step explanation:

first, find the %8.5 out of 12 which is 1.02, and then add 12 + 1.02

Answer:

√27-2 =27-22

√25. =5

the answer is option B

x=27

Answer:

option B : x = 27

Step-by-step explanation:

The initial amount and rate of change given a table for a linear function are $850 and $65, respectively

The table of linear function represents the given parameter

On the table, we have the following points

(x, y) = (6, 460) and (10, 200)

The rate of change is calculated as

Rate = (y2 - y1)/(x2 - x1)

So, we have

Rate = (200 - 460)/(10 - 6)

Evaluate

Rate = -65

This means that the rate of change is -$65

The initial amount is calculated as

y = m(x - x1) + y1

Where

m = -65

So, we have

y = -65(x - x1) + y1

Using one of the points, we have

y = -65(x - 10) + 200

Set x = 0

So, we have

y = -65(0 - 10) + 200

Evaluate

y = 850

Hence, the initial amount and rate of change given a table for a linear function are $850 and $65, respectively

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Answer:

\(4x+3\)

Step-by-step explanation:

\(5x+4+(-x)-1\)

Remove parentheses: \((-a)=-a\)

\(=5x+4-x-1\)

Group like terms

\(=5x-x+4-1\)

Add similar elements: \(5x-x=4x\)

\(=4x+4-1\)

Add/subtract the numbers: \(4-1=3\)

\(=4x+3\)

The mean and variance of a binomial random variable with n trials and success probability p are np and np(1-p), respectively.

The mean and variance of a binomial random variable with n trials and success probability p are given by the following formulas:

Mean = np

Variance = np(1-p)

Where n is the number of trials and p is the probability of success in each trial.

To understand this better, let's consider an example. Suppose we conduct an experiment where we toss a coin 10 times and we want to know the probability of getting exactly 5 heads.

This is a binomial experiment because there are only two possible outcomes (heads or tails) and each trial is independent of the others. The probability of getting a head on any given trial is 0.5.

Using the formula for the mean, we get:

Mean = np = 10 x 0.5 = 5

This means that on average, we can expect to get 5 heads out of 10 tosses.

Using the formula for the variance, we get:

Variance = np(1-p) = 10 x 0.5 x (1-0.5) = 2.5

This means that the spread of the distribution is relatively large, indicating that there is a significant amount of variability in the number of heads we can expect to get.

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The point R must also have a y-coordinate of 2. Since R is equidistant from P and Q,

Since △PQR is equilateral, we know that all three sides are congruent. Therefore, the distance between points P and Q is equal to the distance between points P and R or Q and R.

The distance between P and Q is 8 units (5-(-3) = 8), so the distance between P and R or Q and R must also be 8 units.

Since the triangle is equilateral, the point R must be located on a line that is equidistant from points P and Q. This line is the horizontal line passing through the midpoint of PQ.

The midpoint of PQ is ((-3+5)/2, (2+2)/2) = (1,2). Therefore, the point R must also have a y-coordinate of 2.

Since R is equidistant from P and Q, it must lie on the vertical line passing through the midpoint of PQ. This line is the line x = 1. Therefore, the coordinate of vertex R is (1,2).

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Answer:

2.09 is the answer now what

The formula for the volume of a cone is:

V = (1/3)πr²h

where r is the radius of the base, h is the height of the cone, and π is pi.

In this case, the slant height is given as 17 cm, which we can use with the radius to find the height of the cone using the Pythagorean theorem:

h² = s² - r²

h² = 17² - 8²

h² = 225

h = 15

Now that we have the height, we can plug in the values for r and h into the formula for the volume:

V = (1/3)π(8²)(15)

V = (1/3)π(64)(15)

V = (1/3)(960π)

V = 320π

Therefore, the volume of the cone is 320π cubic cm. Answer: 320π.

Answer:

  about -0.79 mg/hour

Step-by-step explanation:

You want the rate of change of the amount of medication in a patient after 4 hours if the amount after t hours is modeled by y=88/(1+e^(t+0.7)).

The rate of change is found by taking the derivative of the function with respect to time. Let u = 1+e^(t+0.7). Then du/dt = e^(t +0.7).

The function can be written ...

  y = 88/u = 88·u^-1

so its derivative is ...

  dy/dt = (-88·u^-2)·du/dt

  dy/dt = -88(e^(t +0.7))/(1 +e^(t +0.7))^2

The value of the rate of change at t=4 is ...

  dy/dt = -88(e^(4 +0.7))/(1 +e^(4 +0.7))^2 ≈ -88(109.95)/(1 +109.95)^2

  dy/dt ≈ -0.78602 ≈ -0.79 . . . . . . mg/h

The rate of change in the amount of medication is about -0.79 mg/h.

To determine if lab 1 is reporting lower cholesterol levels, on average, than lab 2, a paired t-test for means should be used.

This is because the physician collected pairs of blood samples from each patient and wants to compare the means of the two labs' cholesterol level measurements. The paired t-test for means is appropriate for comparing the means of two related samples, in this case, the blood samples from each patient tested by lab 1 and lab 2.

A paired t-test for means should be used to determine if lab 1 is reporting lower cholesterol levels, on average, than lab 2. This test is appropriate because the data consists of paired samples from the same patients, and the goal is to compare the means of the differences between the two labs.

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The modified Reynolds analogy, also known as the Chilton-Colburn analogy, is expressed mathematically as Nu = f * Re^m * Pr^n. It relates the convective heat transfer coefficient (h) to the skin friction coefficient (Cf) in fluid flow. This equation is widely used in heat transfer analysis and design applications involving forced convection.

The modified Reynolds analogy is a useful tool in heat transfer analysis, especially for situations involving forced convection. It provides a correlation between the heat transfer and fluid flow characteristics. The Nusselt number (Nu) represents the ratio of convective heat transfer to conductive heat transfer, while the Reynolds number (Re) characterizes the flow regime. The Prandtl number (Pr) relates the momentum diffusivity to the thermal diffusivity of the fluid.

The equation incorporates the friction factor (f) to account for the energy dissipation due to fluid flow. The values of the constants m and n depend on the flow conditions and geometry, and they are determined experimentally or by empirical correlations. The modified Reynolds analogy is widely used in engineering calculations and design of heat exchangers, cooling systems, and other applications involving heat transfer in fluid flow.

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Answer:

110 units

Step-by-step explanation:

Triangles EFG and HIJ are similar triangles.

∴ \(\frac{IJ}{FG} =\frac{HJ}{EG}\) (corresponding sides of similar triangles)

   \(\frac{IJ}{11} = \frac{45}{18}\)

 ∴ IJ = 27.5

∴ Perimeter of triangle HIJ

= 27.5 + 37.5 + 45

= 110 units

Answer:

D

Step-by-step explanation:

calculate the length of AB using the distance formula

d = \(\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }\)

with (x₁, y₁ ) = A (4, 2 ) and (x₂, y₂ ) = B (9, 10 )

AB = \(\sqrt{(9-4)^2+(10-2)^2}\)

      = \(\sqrt{5^2+8^2}\)

      = \(\sqrt{25+64}\)

      = \(\sqrt{89}\)

      ≈ 9.4 ( to 1 decimal place )

Answer:

f(2) = -6

General Formulas and Concepts:

Order of Operations: BPEMDAS

Substitution and Evaluation

Step-by-step explanation:

Step 1: Define

f(x) = -2x² + 4x - 6

f(2) is x = 2

Step 2: Solve

The Answer is: The hourly rate option of $112 is higher than the commission rate of $105.

Step-by-step explanation:

She will work 16 hours at $7.00 per hour:

16 * 7 = $112

Or she could take the 5% commission on $2,100:

2100 * .05 = $105.

The hourly rate is higher than the anticipated commission amount.

Answer:

23) 8

24)58

25)im guessing theyre both 90

Step-by-step explanation:

23)if ac=23 then 15-23=x

24) since it's a 90 degree angle the 32+x=90

and 90-32=58

It's 38*23 =874 dollars

Answer:

y= -12

Step-by-step explanation:

4x+8 = -x+3 -> Find x by  using all information

5x=-5  -> Simplify

x=-1   -> Solve

y=-12  -> Plug in to find y

Centering x values before squaring eliminates the correlation between x and its square term, reducing multicollinearity. This helps to determine independent effects of predictor variables, and can also straighten the curve of a scatterplot.

Centering the x values before squaring is important because it helps to eliminate the correlation between the x variable and its square term. When we square a variable without centering it, we are essentially capturing the effect of both the linear and the quadratic terms.

This can lead to multicollinearity, which occurs when two or more predictor variables are highly correlated with each other.

Multicollinearity can create problems in statistical analyses because it can make it difficult to determine the independent effects of each predictor variable on the outcome variable. Centering the x values before squaring helps to reduce the effects of multicollinearity by eliminating the correlation between the x variable and its square term.

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